Operator UX lift: real Ua zero-cross scope, actionable GOOSE empty state, concise SCL and diagnostics

[masarray]

Shipped implementation

• Phase-aligned receive-only oscilloscope: prefer positive-going Ua crossing as the beginning of a real contiguous coherent SV waveform/phasor/RMS window. No synthetic sine, interpolated/fabricated values, or independent per-channel phase shifts. Keep slot-locked fallback for missing/flat Ua or insufficient frames; bounded work only on snapshot publication. Real 2-cycle capture may initially be pending/slot-locked until one extra captured cycle is available.
• GOOSE: actionable, contextual empty-state guidance when filtered events are absent; explains absence ≠ offline and provides adapter/SPAN/TAP/filter/retransmission checks.
• SCL: concise selected-stream identity verdict with grounded mismatch signal, match score explicitly not a probability, detailed original expected vs observed plus binding evidence retained in expander.
• Diagnostics: one concise evidence-driven operator next-check and unchanged real metrics, full forensic event list retained.
• No extra overlays during normal live work; avoid packet-thread/UI work and parallel caches.

Gates

• Windows Release build + test
• Runtime stability
• CodeQL
• Dependency security review
• Verified Windows portable artifact
• Physical QA: injector variable phase / 1366×768 / 125–150% DPI / packet loss and transitions (requires external GUI hardware)

Independent clock lock, publisher timing accuracy, IEC 61850 certification, field acceptability and IED receiver are not claimed by software CI. Refer to physical acceptance issue #30.

[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-17T22:43:34.867810Z	3bb970e	PR opened

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[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 3bb970e4c2

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[chatgpt-codex-connector]

Count an exact zero as only one rising crossing

When Ua contains the common sequence negative, 0, positive, both the zero sample and the following positive sample satisfy this predicate. Because the scan selects the newest candidate, a snapshot taken as the zero becomes eligible starts at zero, while the next received frame moves the start forward one sample. A steady 80-sample/cycle waveform can therefore jump by 4.5° depending only on snapshot timing, reintroducing the scope flicker this alignment is intended to remove; require one side of the crossing to be strictly signed so an exact zero produces a single trigger.

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[chatgpt-codex-connector]

Reject noisy Ua before using it as a phase trigger

For a missing or noise-only Ua channel with raw values such as ±1 count, peak > 1e-6 is always true, so every noise-induced negative-to-positive transition is accepted as a phase reference. The selected start then moves among arbitrary noise crossings on successive publications instead of using the documented slot-locked fallback. Validate that Ua has a meaningful periodic amplitude/crossing slope relative to its noise level rather than merely checking that one sample is nonzero.

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